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Old 04-28-2010, 01:37 PM   #1
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Insulation from addition to old construction


So I have an non heated/cooled crawl space above my addition. As you can imagine it gets very hot or cold up there depending on the season. The actual addition is adequately insulated into the living area. However, the part of the addition that covers the old rear of the house is not insulated. This would be the part of the upstairs of the old part of the house. They have cut and run ducting through the roof of the original house that stick into the crawl space of the addition. Its kinda hard to describe and Ill get pics up if needed. Anyway, these holes are allowing cold/hot air from the addition crawlspace into the floor joist area of the upstairs main living area. Can I simply place insulation over the holes or do I need to seal them some other way first? Also, can i just lay insulation over the old roofing as well? THanks!

Shane
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Old 04-28-2010, 03:15 PM   #2
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Insulation from addition to old construction


You have a crawl space above an addition ?
Usually a crawl space is under a house.

Or is it an attic.....or a crawl space between floors ?
Pics would help
But you should be able to stuff insulation around/in the holes to stop air flow
Might even be required to fire-stop these areas depending upon setup
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Old 04-28-2010, 03:57 PM   #3
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Insulation from addition to old construction


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Originally Posted by Scuba_Dave View Post
You have a crawl space above an addition ?
Usually a crawl space is under a house.

Or is it an attic.....or a crawl space between floors ?
Pics would help
But you should be able to stuff insulation around/in the holes to stop air flow
Might even be required to fire-stop these areas depending upon setup

Well, its more of an attic I guess. Its the attic above the addition. It is however, lower than the top level of the main house. Ill get pics tonight or tomorrow. Thanks Scuba

Shane
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